Musicrems Ear Dictation is a great application created by a REAL MUSICIAN based on a REAL MUSICIANS needs, which helps you to improve your hearing and recognition of any melodic patterns. You will experience many random melodies, based on your personal requirements. The application also uses high quality sounds!
You can control:
-Number of notes
-Number of octaves
-Minimal value of used tones
-Instrument that will play the melodies
Musicrems Ear Dictation app offers 3 instruments to use:
-Acoustic Piano
-Double Bass
-Classic Guitar
More useful stuff: http://www.musicrem.com